Skip to main content
. Author manuscript; available in PMC: 2021 Mar 31.
Published in final edited form as: Environ Toxicol Chem. 2020 Jan;39(1):85–100. doi: 10.1002/etc.4570

Table 3.

Adjusted R2 of Dissolved and Free-Ion Activity MLR Models for Cu

C. dubia D. magna D. obtusa D. pulex O. mykiss P. promelas
Model 1 0.635 0.814 0.816 0.789 0.625 0.749
Model 2 0.043 0.470 0.239 0.738 0.498 0.515
Model 3 0.012 0.468 0.239 0.738 0.301 0.494

Model 1: ln[dissolved Cu] = ln(DOC) + ln(Ca) + pH, Model 2: ln[Cu2+] = ln(Ca) + pH, Model 3: ln[Cu2+] = ln(Ca). Toxicity data sets from Brix et al. (2017).